package chapter04.Example18;
class Animal{
        void  shout(){
        System.out.println("动物叫！");
        }
        public String toString() {
return "这是一个动物类";
        }
        }
public class Example18 {
    public static void main(String[] args) {
        Animal animal = new Animal();
        System.out.println(animal.toString());
    }
}
